// Copyright (C) Kumo inc. and its affiliates.
// Author: Jeff.li lijippy@163.com
// All rights reserved.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published
// by the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.
//

#include <benchmark/benchmark.h>

#include <nebula/testing/ktest_util.h>
#include <nebula/testing/random.h>
#include <turbo/utility/tdigest.h>

namespace nebula {
namespace util {

static constexpr uint32_t kDelta = 100;
static constexpr uint32_t kBufferSize = 500;

static void BenchmarkTDigest(benchmark::State& state) {
  const size_t items = state.range(0);
  std::vector<double> values;
  random_real(items, 0x11223344, -12345678.0, 12345678.0, &values);

  for (auto _ : state) {
    turbo::TDigest td(kDelta, kBufferSize);
    for (double value : values) {
      td.Add(value);
    }
    auto quantile = td.Quantile(0);
    benchmark::DoNotOptimize(quantile);
  }
  state.SetItemsProcessed(state.iterations() * items);
}

BENCHMARK(BenchmarkTDigest)->Arg(1 << 12)->Arg(1 << 16)->Arg(1 << 20);

}  // namespace util
}  // namespace nebula
